Chip Springer's Illustrated technique.
In Adobe Photoshop:
Selected car (magnetic lasso, then Quick Mask).
Heavy noise reduction.
Shadow/Highlights.
Extreme USM.
Paint With Light.
Some star flares.
Inverse selection for background.
Levels, curves for sky.
Masked and painted back detail in foreground.
Surface Blur.
Flattened. Dupe background. Sharpen.
All edits performed on individual layers.